A5021354041- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Radiation Therapy and Dosimetry
- Quantum Chromodynamics and Particle Interactions
- Magnetic confinement fusion research
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Radiopharmaceutical Chemistry and Applications
- Boron Compounds in Chemistry
- Advanced NMR Techniques and Applications
- Radiation Effects in Electronics
- Geophysical and Geoelectrical Methods
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Linguistics and Cultural Studies
- Advanced Machining and Optimization Techniques
- Laser-induced spectroscopy and plasma
Forschungszentrum Jülich
2015-2024
Heinrich Heine University Düsseldorf
2023-2024
RWTH Aachen University
2024
GSI Helmholtz Centre for Heavy Ion Research
2023-2024
University of Cologne
2024
University of Bonn
1993-1998
A new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, tune-defined as number of precessions per turn-is given by ν(s)=γG (γ Lorentz factor, G gyromagnetic anomaly). At 970 MeV/c, deuteron spins coherently precess at a frequency ≈120 kHz in Cooler Synchrotron COSY. The deduced from up-down asymmetry deuteron-carbon scattering. time interval 2.6 s, was determined with precision order 10^{-8}, 1×10^{-10} for continuous 100 s accelerator cycle. This...
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of magnetic storage ring (COSY). This long spin coherence time is maintained through combination bunching, electron cooling, sextupole field corrections, and suppression collective effects current limits. record required for search an intrinsic electric dipole moment on at statistical sensitivity level approaching 10^{-29} e cm.
<ns3:p>Background Research with neutrons is usually related to the use of fission-based research reactors or neutron spallation sources offer beams for science and industry. In recent years a novel way production brilliant cold, thermal, epithermal has emerged availability high current proton accelerator systems. These “High-Current Accelerator-driven Neutron Sources” (HiCANS) pulsed peak brilliance close present day sources. Methods A project was launched at Jülich Centre Science...
The proposed method exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM) aligned along the particle spin axis. Statistical sensitivities could approach 10$^{-29}$ e$\cdot$cm. challenge will be reduce systematic errors similar levels. adjusted preserve polarisation, initially parallel velocity, times in excess of 15 minutes. Large radial fields, acting through EDM, rotate polarisation from...
Excitation functions A(N)(p(p),Theta(c.m.)) of the analyzing power in pp--> elastic scattering have been measured with a polarized atomic hydrogen target for projectile momenta p(p) between 1000 and 3300 MeV/ c. The experiment was performed angles 30 degrees </=Theta(c.m.)</=90 using recirculating beam proton storage ring COSY during acceleration. resulting excitation angular distributions high internal consistency significant impact on recent phase shift solution SAID SP99, particular, spin...
The vector and tensor polarizations of a deuteron beam have been measured using elastic deuteron-carbon scattering at 75.6 MeV deuteron-proton 270 MeV. After acceleration to 1170 inside the COSY ring, deuterons were checked by studying variety nuclear reactions cluster target ANKE magnet spectrometer placed an internal position storage ring. All these measurements consistent with absence depolarization during provide number secondary standards that can be used in subsequent experiments facility.
The High Brilliance neutron Source (HBS) is a project for next generation research facility, based on new concepts and recent technological advancements. As elementary processes it uses neither fission nor spallation, but instead low energy nuclear reactions in very compact Target-ModeratorReflector (TMR) assembly. Our facility design results efficient production of beams with high brightness. Key features HBS are: (i) competitive instrument performance, (ii) comparatively construction...
Abstract Cross sections of proton-induced nuclear reactions on enriched $$^{\mathrm {86}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>86</mml:mn> </mml:msup> </mml:math> Sr target were measured by the activation technique up to proton energies 44 MeV. The isomeric cross-section ratios for {86m,g}}$$ <mml:mrow> <mml:mi>m</mml:mi> <mml:mo>,</mml:mo> <mml:mi>g</mml:mi> </mml:mrow> Y and {85m,g}}$$ <mml:mn>85</mml:mn> as a function projectile...
The polarized ion source for COSY-Jülich has been set in operation. produces H− or D− beams by means of a charge exchange reaction. For the first time beam acceleration injector cyclotron and measurement polarization downstream took place. working scheme this colliding-beam latest results are discussed.
At the Cooler Synchrotron COSY/J\"ulich spin-correlation parameters in elastic proton-proton ($pp$) scattering have been measured with a 2.11 GeV polarized proton beam and hydrogen atomic target. We report results for ${A}_{NN}$, ${A}_{SS}$, ${A}_{SL}$ c.m. angles between $30\ifmmode^\circ\else\textdegree\fi{}$ $90\ifmmode^\circ\else\textdegree\fi{}$. Our data on ${A}_{SS}$---the first measurement of this observable above 800 MeV---clearly disagrees predictions available $pp$ phase-shift...
Neutrons are an essential tool in science and research for probing the structure dynamics of matter from mesoscale to picoscale seconds femtoseconds.To release neutrons ...
High Current Accelerator driven Neutron Sources (HiCANS) are a cost-efficient alternative for future large scale neutron facilities. They excel in transforming neutrons released by the primary nuclear reaction into spectral range usable applications. In particular, cost of target station represents only minor fraction overall construction due to lower energy neutrons, which requires less shielding. can be designed provide optimized pulse and properties applications scattering, analytics...
Excitation functions of the spin correlation coefficients ${A}_{\mathit{NN}}({p}_{\mathrm{lab}},{\ensuremath{\theta}}_{c.m.}),{A}_{\mathit{SS}}({p}_{\mathrm{lab}},{\ensuremath{\theta}}_{c.m.})$, and ${A}_{\mathit{SL}}({p}_{\mathrm{lab}},{\ensuremath{\theta}}_{c.m.})$ have been measured with polarized proton beam Cooler Synchrotron an internal atomic target. Data were taken continuously during acceleration for momenta ${p}_{\mathrm{lab}}$ ranging from 1000 to 3300 MeV/c (kinetic energies...
This work presents the production cross-sections of Ce, Tb and Dy radionuclides produced by 300 MeV to 1.7 GeV proton-induced spallation reactions in thin tantalum targets as well related Thick Target Yield (TTY) values ratios. The motivation is optimise terbium for medical applications find out at which energy purity collection mass separation would be highest. For that purpose, activation experiments were performed using COSY synchrotron FZ Jülich utilising stacked-foils technique γ...
The high-energy storage ring (HESR) of the international facility for antiproton and ion research (FAIR) at GSI in Darmstadt is dedicated to strong interaction studies with antiprotons momentum range from 1.5 15 GeV/c. Powerful phase-space cooling needed reach demanding experimental requirements terms luminosity beam quality. Status details technical planning including cryogenic concept will be presented.
A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development first was Cooler Synchrotron (COSY) at Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, particle energy suitable an EDM search. The requires high efficiency, large analyzing power, stable operating characteristics. With typical beam momenta about...
The neutron yield for beryllium, vanadium and tantalum irradiated with 22, 27, 33 42 MeV protons is indirectly determined by Prompt Gamma Neutron Activation Analysis (PGNAA). neutron-to-gamma conversion rate measured an AmBe calibration source. Corrections escaped neutrons are applied via MCNP simulations of the experiment using ENDF/B-VII.1 database. experimental results in good agreement obtained from deviating 0.4% to 13%.
This project exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM, $\vec d$) aligned along the particle spin axis. Statistical sensitivities can approach $10^{-29}$~e$\cdot$cm. The challenge will be reduce systematic errors similar levels. adjusted preserve polarization, initially parallel velocity, times in excess of 15 minutes. Large radial fields, acting through EDM, rotate polarization ($\vec...